diff mbox series

fbdev: Use of_property_present() for testing DT property presence

Message ID 20230310144729.1545943-1-robh@kernel.org
State New
Headers
Series fbdev: Use of_property_present() for testing DT property presence |

Commit Message

Rob Herring March 10, 2023, 2:47 p.m. UTC 
  It is preferred to use typed property access functions (i.e.
of_property_read_<type> functions) rather than low-level
of_get_property/of_find_property functions for reading properties. As
part of this, convert of_get_property/of_find_property calls to the
recently added of_property_present() helper when we just want to test
for presence of a property and nothing more.

Signed-off-by: Rob Herring <robh@kernel.org>
---
 drivers/video/fbdev/amba-clcd.c                          | 2 +-
 drivers/video/fbdev/bw2.c                                | 2 +-
 drivers/video/fbdev/cg3.c                                | 2 +-
 drivers/video/fbdev/omap2/omapfb/dss/omapdss-boot-init.c | 2 +-
 4 files changed, 4 insertions(+), 4 deletions(-)

Comments

kernel test robot March 11, 2023, 4:40 a.m. UTC | #1 
Hi Rob,

I love your patch! Yet something to improve:

[auto build test ERROR on drm-misc/drm-misc-next]
[If your patch is applied to the wrong git tree, kindly drop us a note.
And when submitting patch, we suggest to use '--base' as documented in
https://git-scm.com/docs/git-format-patch#_base_tree_information]

url:    https://github.com/intel-lab-lkp/linux/commits/Rob-Herring/fbdev-Use-of_property_present-for-testing-DT-property-presence/20230310-225754
base:   git://anongit.freedesktop.org/drm/drm-misc drm-misc-next
patch link:    https://lore.kernel.org/r/20230310144729.1545943-1-robh%40kernel.org
patch subject: [PATCH] fbdev: Use of_property_present() for testing DT property presence
config: arm64-randconfig-r032-20230310 (https://download.01.org/0day-ci/archive/20230311/202303111229.3Uuc8JQV-lkp@intel.com/config)
compiler: clang version 17.0.0 (https://github.com/llvm/llvm-project 67409911353323ca5edf2049ef0df54132fa1ca7)
reproduce (this is a W=1 build):
        wget https://raw.githubusercontent.com/intel/lkp-tests/master/sbin/make.cross -O ~/bin/make.cross
        chmod +x ~/bin/make.cross
        # install arm64 cross compiling tool for clang build
        # apt-get install binutils-aarch64-linux-gnu
        # https://github.com/intel-lab-lkp/linux/commit/c013f4111f36b0b4327e7fbf46c0dd93399e9209
        git remote add linux-review https://github.com/intel-lab-lkp/linux
        git fetch --no-tags linux-review Rob-Herring/fbdev-Use-of_property_present-for-testing-DT-property-presence/20230310-225754
        git checkout c013f4111f36b0b4327e7fbf46c0dd93399e9209
        # save the config file
        mkdir build_dir && cp config build_dir/.config
        COMPILER_INSTALL_PATH=$HOME/0day COMPILER=clang make.cross W=1 O=build_dir ARCH=arm64 olddefconfig
        COMPILER_INSTALL_PATH=$HOME/0day COMPILER=clang make.cross W=1 O=build_dir ARCH=arm64 SHELL=/bin/bash drivers/video/fbdev/

If you fix the issue, kindly add following tag where applicable
| Reported-by: kernel test robot <lkp@intel.com>
| Link: https://lore.kernel.org/oe-kbuild-all/202303111229.3Uuc8JQV-lkp@intel.com/

All errors (new ones prefixed by >>):

>> drivers/video/fbdev/amba-clcd.c:857:6: error: call to undeclared function 'of_property_present'; ISO C99 and later do not support implicit function declarations [-Wimplicit-function-declaration]
           if (of_property_present(node, "memory-region")) {
               ^
   drivers/video/fbdev/amba-clcd.c:857:6: note: did you mean 'fwnode_property_present'?
   include/linux/property.h:59:6: note: 'fwnode_property_present' declared here
   bool fwnode_property_present(const struct fwnode_handle *fwnode,
        ^
   1 error generated.


vim +/of_property_present +857 drivers/video/fbdev/amba-clcd.c

   843	
   844	static struct clcd_board *clcdfb_of_get_board(struct amba_device *dev)
   845	{
   846		struct clcd_board *board = devm_kzalloc(&dev->dev, sizeof(*board),
   847				GFP_KERNEL);
   848		struct device_node *node = dev->dev.of_node;
   849	
   850		if (!board)
   851			return NULL;
   852	
   853		board->name = of_node_full_name(node);
   854		board->caps = CLCD_CAP_ALL;
   855		board->check = clcdfb_check;
   856		board->decode = clcdfb_decode;
 > 857		if (of_property_present(node, "memory-region")) {
   858			board->setup = clcdfb_of_vram_setup;
   859			board->mmap = clcdfb_of_vram_mmap;
   860			board->remove = clcdfb_of_vram_remove;
   861		} else {
   862			board->setup = clcdfb_of_dma_setup;
   863			board->mmap = clcdfb_of_dma_mmap;
   864			board->remove = clcdfb_of_dma_remove;
   865		}
   866	
   867		return board;
   868	}
   869	#else
   870	static struct clcd_board *clcdfb_of_get_board(struct amba_device *dev)
   871	{
   872		return NULL;
   873	}
   874	#endif
   875
kernel test robot March 11, 2023, 1:42 p.m. UTC | #2 
Hi Rob,

I love your patch! Yet something to improve:

[auto build test ERROR on drm-misc/drm-misc-next]
[If your patch is applied to the wrong git tree, kindly drop us a note.
And when submitting patch, we suggest to use '--base' as documented in
https://git-scm.com/docs/git-format-patch#_base_tree_information]

url:    https://github.com/intel-lab-lkp/linux/commits/Rob-Herring/fbdev-Use-of_property_present-for-testing-DT-property-presence/20230310-225754
base:   git://anongit.freedesktop.org/drm/drm-misc drm-misc-next
patch link:    https://lore.kernel.org/r/20230310144729.1545943-1-robh%40kernel.org
patch subject: [PATCH] fbdev: Use of_property_present() for testing DT property presence
config: arm-allyesconfig (https://download.01.org/0day-ci/archive/20230311/202303112153.uPbFjEUI-lkp@intel.com/config)
compiler: arm-linux-gnueabi-gcc (GCC) 12.1.0
reproduce (this is a W=1 build):
        wget https://raw.githubusercontent.com/intel/lkp-tests/master/sbin/make.cross -O ~/bin/make.cross
        chmod +x ~/bin/make.cross
        # https://github.com/intel-lab-lkp/linux/commit/c013f4111f36b0b4327e7fbf46c0dd93399e9209
        git remote add linux-review https://github.com/intel-lab-lkp/linux
        git fetch --no-tags linux-review Rob-Herring/fbdev-Use-of_property_present-for-testing-DT-property-presence/20230310-225754
        git checkout c013f4111f36b0b4327e7fbf46c0dd93399e9209
        # save the config file
        mkdir build_dir && cp config build_dir/.config
        COMPILER_INSTALL_PATH=$HOME/0day COMPILER=gcc-12.1.0 make.cross W=1 O=build_dir ARCH=arm olddefconfig
        COMPILER_INSTALL_PATH=$HOME/0day COMPILER=gcc-12.1.0 make.cross W=1 O=build_dir ARCH=arm SHELL=/bin/bash

If you fix the issue, kindly add following tag where applicable
| Reported-by: kernel test robot <lkp@intel.com>
| Link: https://lore.kernel.org/oe-kbuild-all/202303112153.uPbFjEUI-lkp@intel.com/

All errors (new ones prefixed by >>):

   drivers/video/fbdev/amba-clcd.c: In function 'clcdfb_of_get_board':
>> drivers/video/fbdev/amba-clcd.c:857:13: error: implicit declaration of function 'of_property_present'; did you mean 'fwnode_property_present'? [-Werror=implicit-function-declaration]
     857 |         if (of_property_present(node, "memory-region")) {
         |             ^~~~~~~~~~~~~~~~~~~
         |             fwnode_property_present
   cc1: some warnings being treated as errors


vim +857 drivers/video/fbdev/amba-clcd.c

   843	
   844	static struct clcd_board *clcdfb_of_get_board(struct amba_device *dev)
   845	{
   846		struct clcd_board *board = devm_kzalloc(&dev->dev, sizeof(*board),
   847				GFP_KERNEL);
   848		struct device_node *node = dev->dev.of_node;
   849	
   850		if (!board)
   851			return NULL;
   852	
   853		board->name = of_node_full_name(node);
   854		board->caps = CLCD_CAP_ALL;
   855		board->check = clcdfb_check;
   856		board->decode = clcdfb_decode;
 > 857		if (of_property_present(node, "memory-region")) {
   858			board->setup = clcdfb_of_vram_setup;
   859			board->mmap = clcdfb_of_vram_mmap;
   860			board->remove = clcdfb_of_vram_remove;
   861		} else {
   862			board->setup = clcdfb_of_dma_setup;
   863			board->mmap = clcdfb_of_dma_mmap;
   864			board->remove = clcdfb_of_dma_remove;
   865		}
   866	
   867		return board;
   868	}
   869	#else
   870	static struct clcd_board *clcdfb_of_get_board(struct amba_device *dev)
   871	{
   872		return NULL;
   873	}
   874	#endif
   875
Rob Herring March 11, 2023, 3:15 p.m. UTC | #3 
On Fri, Mar 10, 2023 at 10:41 PM kernel test robot <lkp@intel.com> wrote:
>
> Hi Rob,
>
> I love your patch! Yet something to improve:
>
> [auto build test ERROR on drm-misc/drm-misc-next]
> [If your patch is applied to the wrong git tree, kindly drop us a note.
> And when submitting patch, we suggest to use '--base' as documented in
> https://git-scm.com/docs/git-format-patch#_base_tree_information]
>
> url:    https://github.com/intel-lab-lkp/linux/commits/Rob-Herring/fbdev-Use-of_property_present-for-testing-DT-property-presence/20230310-225754
> base:   git://anongit.freedesktop.org/drm/drm-misc drm-misc-next
> patch link:    https://lore.kernel.org/r/20230310144729.1545943-1-robh%40kernel.org
> patch subject: [PATCH] fbdev: Use of_property_present() for testing DT property presence
> config: arm64-randconfig-r032-20230310 (https://download.01.org/0day-ci/archive/20230311/202303111229.3Uuc8JQV-lkp@intel.com/config)
> compiler: clang version 17.0.0 (https://github.com/llvm/llvm-project 67409911353323ca5edf2049ef0df54132fa1ca7)
> reproduce (this is a W=1 build):
>         wget https://raw.githubusercontent.com/intel/lkp-tests/master/sbin/make.cross -O ~/bin/make.cross
>         chmod +x ~/bin/make.cross
>         # install arm64 cross compiling tool for clang build
>         # apt-get install binutils-aarch64-linux-gnu
>         # https://github.com/intel-lab-lkp/linux/commit/c013f4111f36b0b4327e7fbf46c0dd93399e9209
>         git remote add linux-review https://github.com/intel-lab-lkp/linux
>         git fetch --no-tags linux-review Rob-Herring/fbdev-Use-of_property_present-for-testing-DT-property-presence/20230310-225754
>         git checkout c013f4111f36b0b4327e7fbf46c0dd93399e9209

Looks like this patch was applied to drm-next which was/is based on
v6.2-rc6. This patch is dependent on a change in v6.3-rc1.

Rob
diff mbox series

Patch

diff --git a/drivers/video/fbdev/amba-clcd.c b/drivers/video/fbdev/amba-clcd.c
index f65c96d1394d..e45338227be6 100644
--- a/drivers/video/fbdev/amba-clcd.c
+++ b/drivers/video/fbdev/amba-clcd.c
@@ -854,7 +854,7 @@  static struct clcd_board *clcdfb_of_get_board(struct amba_device *dev)
 	board->caps = CLCD_CAP_ALL;
 	board->check = clcdfb_check;
 	board->decode = clcdfb_decode;
-	if (of_find_property(node, "memory-region", NULL)) {
+	if (of_property_present(node, "memory-region")) {
 		board->setup = clcdfb_of_vram_setup;
 		board->mmap = clcdfb_of_vram_mmap;
 		board->remove = clcdfb_of_vram_remove;
diff --git a/drivers/video/fbdev/bw2.c b/drivers/video/fbdev/bw2.c
index 6403ae07970d..9cbadcd18b25 100644
--- a/drivers/video/fbdev/bw2.c
+++ b/drivers/video/fbdev/bw2.c
@@ -306,7 +306,7 @@  static int bw2_probe(struct platform_device *op)
 	if (!par->regs)
 		goto out_release_fb;
 
-	if (!of_find_property(dp, "width", NULL)) {
+	if (!of_property_present(dp, "width")) {
 		err = bw2_do_default_mode(par, info, &linebytes);
 		if (err)
 			goto out_unmap_regs;
diff --git a/drivers/video/fbdev/cg3.c b/drivers/video/fbdev/cg3.c
index bdcc3f6ab666..3a37fff4df36 100644
--- a/drivers/video/fbdev/cg3.c
+++ b/drivers/video/fbdev/cg3.c
@@ -393,7 +393,7 @@  static int cg3_probe(struct platform_device *op)
 
 	cg3_blank(FB_BLANK_UNBLANK, info);
 
-	if (!of_find_property(dp, "width", NULL)) {
+	if (!of_property_present(dp, "width")) {
 		err = cg3_do_default_mode(par);
 		if (err)
 			goto out_unmap_screen;
diff --git a/drivers/video/fbdev/omap2/omapfb/dss/omapdss-boot-init.c b/drivers/video/fbdev/omap2/omapfb/dss/omapdss-boot-init.c
index 0ae0cab252d3..09f719af0d0c 100644
--- a/drivers/video/fbdev/omap2/omapfb/dss/omapdss-boot-init.c
+++ b/drivers/video/fbdev/omap2/omapfb/dss/omapdss-boot-init.c
@@ -192,7 +192,7 @@  static int __init omapdss_boot_init(void)
 	omapdss_walk_device(dss, true);
 
 	for_each_available_child_of_node(dss, child) {
-		if (!of_find_property(child, "compatible", NULL))
+		if (!of_property_present(child, "compatible"))
 			continue;
 
 		omapdss_walk_device(child, true);